66650171711 has 8 divisors (see below), whose sum is σ = 67479141744. Its totient is φ = 65821819840.

The previous prime is 66650171683. The next prime is 66650171713. The reversal of 66650171711 is 11717105666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66650171711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66650171713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64355 + ... + 370731.

It is an arithmetic number, because the mean of its divisors is an integer number (8434892718).

Almost surely, 2^66650171711 is an apocalyptic number.

66650171711 is a deficient number, since it is larger than the sum of its proper divisors (828970033).

66650171711 is a wasteful number, since it uses less digits than its factorization.

66650171711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309081.

The product of its (nonzero) digits is 52920, while the sum is 41.

The spelling of 66650171711 in words is "sixty-six billion, six hundred fifty million, one hundred seventy-one thousand, seven hundred eleven".